How to authenticate users with Tokens using Cognito

cognito.js

const AccessToken = new CognitoAccessToken({ AccessToken: tokens.accessToken });
const IdToken = new CognitoIdToken({ IdToken: tokens.idToken });
const RefreshToken = new CognitoRefreshToken({ RefreshToken: tokens.refreshToken });

const sessionData = {
  IdToken: IdToken,
  AccessToken: AccessToken,
  RefreshToken: RefreshToken
};
const userSession = new CognitoUserSession(sessionData);

const userData = {
  Username: email,
  Pool: this.userPool
};

const cognitoUser = new CognitoUser(userData);
cognitoUser.setSignInUserSession(userSession);

cognitoUser.getSession(function (err, session) { // You must run this to verify that session (internally)
  if (session.isValid()) {
    // Update attributes or whatever else you want to do
  } else {
    // TODO: What to do if session is invalid?
  }
});